CN106867077A - A kind of crosslinked polyethylene insulation material and preparation method thereof - Google Patents
A kind of crosslinked polyethylene insulation material and preparation method thereof Download PDFInfo
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- CN106867077A CN106867077A CN201710103511.XA CN201710103511A CN106867077A CN 106867077 A CN106867077 A CN 106867077A CN 201710103511 A CN201710103511 A CN 201710103511A CN 106867077 A CN106867077 A CN 106867077A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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Abstract
The present invention relates to insulating materials field, and in particular to a kind of crosslinked polyethylene insulation material and preparation method thereof.Forced down present invention aim to address existing crosslinked polyethylene insulation material breakdown potential, aging problem easily occurs, proposed a kind of with good breakdown characteristics and anti-aging crosslinked polyethylene insulation material.The present invention takes 100 parts of low density polyethylene (LDPE)s, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch according to proportioning, by mixing, co-melting, cross-linking reaction, dries prepared crosslinked polyethylene insulation material.Cross-linking polyethylene materials of the invention have superior breakdown characteristics, while having good thermal conductivity again, help to reduce insulating materials operating temperature, extend the materials'use life-span.The present invention is applied to making HVDC transmission line cable.
Description
Technical field
The present invention relates to insulating materials field, and in particular to a kind of crosslinked polyethylene insulation material and preparation method thereof.
Background technology
HVDC transmission line has been widely adopted due to its excellent electric property in long distance powedr transmission, and straight
The working field strength that flows power cable insulation is high, insulation thickness is thin, the outside diameter of cable is small, lightweight, current-carrying capacity big, without exchange
The advantages such as magnetic field, therefore direct current high tension transmission cable is used as a part indispensable in DC transmission system, is high voltage power transmission
In important topic.Start using the initial stage in high voltage direct current cable, it is main to use type cable and oil-filled cable, its
Have the disadvantage manufacturing process complexity, high cost, difficult in maintenance.Crosslinked polyethylene (XLPE) insulating high-voltage direct current cable starts within 1999
Using, by its working field strength it is high, insulation thickness is thin, the outside diameter of cable is small, lightweight, manufacture install easily, current-carrying capacity it is big,
The advantages of not having the advantage in terms of AC magnetic field, environmental protection is accepted extensively quickly.With Technology of HVDC based Voltage Source Converter increasingly into
Ripe, XLPE insulating high-voltage direct current cables in terms of continental Grid of the connection across broad straits except continuing to keep absolute predominance
Outward, also to sides such as the land interconnection of asynchronous power network, big city power supply capacity increase, island load power transmission, renewable energy power generation conveyings
Application is expanded in face.It was predicted that the voltage class of external high voltage direct current cable XLPE insulating materials will be carried further in the coming years
Height, consumption will be significantly increased.At present, XLPE can be applied in the insulation of the cable dry type of basic, normal, high pressure, be finally possible to
Full substitution dipping paper cable.
The high voltage direct current cable XLPE insulating materials of current application all remains some shortcomings：First, the generation of space charge
And accumulation, when insulated cable uses polymer as insulation, polymer has substantial amounts of localized state, resulting space electricity
Lotus effect is embodied in two aspects to insulating barrier internal field, the influence of this internal field：One is electric field distortion effect, is made absolutely
Edge layer inside local field strength increases several times；Two is non-electric field distortion effect, i.e. space charge in injected media or with its other party
Formula is deposited in media as well, and original localized modes are departed from when there is quick trap, the i.e. space charge of moving back, in quick recombination process, by
In the release of big energy, dielectric material will be caused to puncture or dielectric material is produced the localized degradation rows such as electric branch
For, it is now recognized that the space charge for reducing and eliminating in insulating materials is the key for developing high voltage direct current cable, particularly when straight
During stream cable polarity inversion, local field strength may be caused higher than average field-strength more than ten times, make insulation instantaneous breakdown.Therefore, insulate
Material need to have good breakdown characteristics.
Direct current cables insulating materials is chronically under high temperature, working environment, and insulating materials easily occurs degradation phenomena, so that
Influence its insulating properties.To delay or suppressing the carrying out of insulating materials oxidizing process, prevent the aging of polymer and extend it to make
With the life-span, add antioxidant and prepare upper essential link as direct current cables.But the operation of direct current cables long term high temperature can make
Insulating materials is aging, promotes antioxidant to produce inhibition.In process of inhibition, anti-oxidant performance and structure may change
Become, and then cable internal electric field is distorted, cause cable to be easier insulation fault.
The content of the invention
Forced down present invention aim to address existing crosslinked polyethylene insulation material breakdown potential, aging problem easily occur,
Propose a kind of with good breakdown characteristics and anti-aging crosslinked polyethylene insulation material.
The present invention is adopted the technical scheme that to solve the above problems：The crosslinked polyethylene insulation material presses quality percentage
Than being prepared by following components：
The preparation method of crosslinked polyethylene insulation material of the invention, concretely comprises the following steps：
Step 1,100 parts of XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant are taken according to proportioning
1010th, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch；
Step 2, by XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, antioxygen
It is uniform that agent DLTP, antioxidant 1024, fluorubber masterbatch are added to stirrer for mixing simultaneously；
Step 3, above-mentioned material is transferred in closed kneading machine, melt blending is carried out at a temperature of 100~120 DEG C；
Step 4, above-mentioned material is transferred in vulcanizing press, cross-linking reaction, 30~60min are carried out at 150~180 DEG C
Afterwards, obtain with the addition of the crosslinked polyethylene product of nano-graphite；
Step 5, drying tower will be sucked after products therefrom cooling in step 4,60 DEG C of design temperature takes out after drying 30min.
Beneficial effect：The nano-graphite that the present invention is added in XLPE has the effect for attracting and capturing carrier, can make
Carrier is distributed in XLPE and tends to uniform, eliminates space charge, crosslinked polyethylene insulation material of the invention is had good
Good breakdown characteristics；Meanwhile, nano-graphite has good thermal conductivity, the heat derives that will can be produced in the course of work, has
Help reduce insulating materials operating temperature, extend the materials'use life-span.
Specific embodiment
Specific embodiment one：The crosslinked polyethylene insulation material of present embodiment by mass percentage, by following components
Prepare：
Specific embodiment two：The preparation method of the crosslinked polyethylene insulation material of present embodiment, concretely comprises the following steps：
Step 1,100 parts of XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant are taken according to proportioning
1010th, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch；
Step 2, by XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, antioxygen
It is uniform that agent DLTP, antioxidant 1024, fluorubber masterbatch are added to stirrer for mixing simultaneously；
Step 3, above-mentioned material is transferred in closed kneading machine, melt blending is carried out at a temperature of 100~120 DEG C；
Step 4, above-mentioned material is transferred in vulcanizing press, cross-linking reaction, 30~60min are carried out at 150~180 DEG C
Afterwards, obtain with the addition of the crosslinked polyethylene product of nano-graphite；
Step 5, drying tower will be sucked after products therefrom cooling in step 4,60 DEG C of design temperature takes out after drying 30min.
Claims (2)
1. a kind of crosslinked polyethylene insulation material, it is characterised in that by mass percentage, prepared by following components：
2. the preparation method of crosslinked polyethylene insulation material according to claim 1, it is characterised in that concretely comprise the following steps：
Step 1,100 parts of low density polyethylene (LDPE)s, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, anti-are taken according to proportioning
Oxygen agent 1010, anti-oxidant DLTP, antioxidant 1024, fluorubber masterbatch；
Step 2, by XLPE, EVA, nano-graphite, PP, crosslink agent DCP, antioxidant 300, antioxidant 1010, antioxidant
It is uniform that DLTP, antioxidant 1024, fluorubber masterbatch are added to stirrer for mixing simultaneously；
Step 3, above-mentioned material is transferred in closed kneading machine, melt blending is carried out at a temperature of 100~120 DEG C；
Step 4, above-mentioned material is transferred in vulcanizing press, cross-linking reaction is carried out at 150~180 DEG C, after 30~60min, obtained
To the crosslinked polyethylene product that with the addition of nano-graphite；
Step 5, drying tower will be sucked after products therefrom cooling in step 4,60 DEG C of design temperature takes out after drying 30min.
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| CN201710103511.XA CN106867077A (en) | 2017-02-24 | 2017-02-24 | A kind of crosslinked polyethylene insulation material and preparation method thereof |
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| CN201710103511.XA CN106867077A (en) | 2017-02-24 | 2017-02-24 | A kind of crosslinked polyethylene insulation material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915887A (en) * | 2017-12-12 | 2018-04-17 | 哈尔滨理工大学 | Nano-particle dispersiveness modification method in a kind of Polyethylene Nanocomposites |
| US20220017704A1 (en) * | 2020-07-20 | 2022-01-20 | Northwestern University | Methods of forming crosslinked polyolefin nanocomposites having high wear resistance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418092A (en) * | 2008-10-31 | 2009-04-29 | 清华大学 | Positive temperature coefficient macromolecule composite material for temperature sensing cable and preparation method |
| CN103965543A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨理工大学 | Crosslinkable polyethylene insulation material for high-voltage direct-current cable |
| CN106633303A (en) * | 2016-12-21 | 2017-05-10 | 西安交通大学 | Nano composite crosslinked polyethylene insulating material with high direct current breakdown field strength and preparation method of nano composite crosslinked polyethylene insulating material |
-
2017
- 2017-02-24 CN CN201710103511.XA patent/CN106867077A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418092A (en) * | 2008-10-31 | 2009-04-29 | 清华大学 | Positive temperature coefficient macromolecule composite material for temperature sensing cable and preparation method |
| CN103965543A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨理工大学 | Crosslinkable polyethylene insulation material for high-voltage direct-current cable |
| CN106633303A (en) * | 2016-12-21 | 2017-05-10 | 西安交通大学 | Nano composite crosslinked polyethylene insulating material with high direct current breakdown field strength and preparation method of nano composite crosslinked polyethylene insulating material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915887A (en) * | 2017-12-12 | 2018-04-17 | 哈尔滨理工大学 | Nano-particle dispersiveness modification method in a kind of Polyethylene Nanocomposites |
| US20220017704A1 (en) * | 2020-07-20 | 2022-01-20 | Northwestern University | Methods of forming crosslinked polyolefin nanocomposites having high wear resistance |
| US11643511B2 (en) * | 2020-07-20 | 2023-05-09 | Northwestern University | Methods of forming crosslinked polyolefin nanocomposites having high wear resistance |
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Application publication date: 20170620 |
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